21887920

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2557}}^1$

素因数の和:2677

約数の個数: 40

約数和(自身を含む): 51385104

約数和(自身を除く): 29497184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2557, 4280, 5114, 8560, 10228, 12785, 20456, 25570, 40912, 51140, 102280, 204560, 273599, 547198, 1094396, 1367995, 2188792, 2735990, 4377584, 5471980, 10943960, 21887920]

約数ペア:

[(1, 21887920), (2, 10943960), (4, 5471980), (5, 4377584), (8, 2735990), (10, 2188792), (16, 1367995), (20, 1094396), (40, 547198), (80, 273599), (107, 204560), (214, 102280), (428, 51140), (535, 40912), (856, 25570), (1070, 20456), (1712, 12785), (2140, 10228), (2557, 8560), (4280, 5114)]